21725620

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{3167}}^1$

素因数の和:3197

約数の個数: 48

約数和(自身を含む): 53222400

約数和(自身を除く): 31496780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3167, 3430, 6334, 6860, 12668, 15835, 22169, 31670, 44338, 63340, 88676, 110845, 155183, 221690, 310366, 443380, 620732, 775915, 1086281, 1551830, 2172562, 3103660, 4345124, 5431405, 10862810, 21725620]

約数ペア:

[(1, 21725620), (2, 10862810), (4, 5431405), (5, 4345124), (7, 3103660), (10, 2172562), (14, 1551830), (20, 1086281), (28, 775915), (35, 620732), (49, 443380), (70, 310366), (98, 221690), (140, 155183), (196, 110845), (245, 88676), (343, 63340), (490, 44338), (686, 31670), (980, 22169), (1372, 15835), (1715, 12668), (3167, 6860), (3430, 6334)]